This is a variation of the classic card game, War. But with a slight twist. Play as you normally would. The winner gets to decide if he/she takes a drink (determined before game), or if he/she gives a drink to the opponent.

When there is a tie, instead of settling it with a card war, you settle it with a drinking war. Both players must chug a whole beer (or whatever you're drinking). The last one to finish is the loser and must also take an additional drink.